More specific code to ETEAM

Signed-off-by: Emmy D'Anello <emmy.danello@animath.fr>

chat/static/tfjm/chat_eteam.webmanifest

@@ -0,0 +1,17 @@
+{
+    "background_color": "white",
+    "description": "Chat for ETEAM",
+    "display": "standalone",
+    "icons": [
+        {
+            "src": "/static/tfjm/img/eteam.png",
+            "sizes": "512x512",
+            "type": "image/png",
+            "purpose": "maskable"
+        }
+    ],
+    "name": "ETEAM Chat",
+    "short_name": "ETEAM Chat",
+    "start_url": "/chat/fullscreen",
+    "theme_color": "black"
+}